Winders and rewinders for paper machines



Oct. 22, 1963 R. GREDING WINDERS AND REWINDERS FOR PAPER MACHINES FiledMarch 8, 1962 5 Sheets-Sheet J.

INVENTOR. ROBERT GEELDING A ORA/EX Oct. 22, 1963 R. GREDING 3,107,873

WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 5Sheets-Sheet 2 INVENTOR. ROBERT (312 ED l NG ATZZOPA/EY Oct. 22, 1963 ii R. GREDING 3,107,873

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WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 sSheets-Sheet 4 X5 2 INVENTOR.

I ROBERT GEEDING ATT PNEX Oct. 22, 1963 R. GREDING 3,107,873

WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 5Sheets-Sheet 5 INVENTOR. ROBERT GEEDI NG United States Patent 3,107,873WINDERS AND REWINDERS FOR PAPER MACHINES Robert Greding, Beaconsfield,Quebec, Canada, assignor to Dominion Engineering Works Limited FiledMar. 8, 1962, Ser. No. 178,393 1 Ciaim. (Cl. 242-66) This inventionrelates to new and improved winders and rewinders for paper machines andmore particularly to winders and rewinders having an ejector mechanismwhich will eject rolls of all sizes from winders or rewinders, from afully wound roll down to an empty core shfit.

A winder, or more specifically a slitter-winder, is positioned at thedry end of a paper machine after the calender and reel, and comprisesslitters and windup stand in one single unit. Its function is to rewindthe paper which has been wound by the reel and which contains breaks andrough edges, and at the same time to slit the paper into the requiredwidths. The two drums, upon which the core shaft rests, are drivingdrums and, therefore, turn the core shaft by surface contact, which,therefore, maintains a constant paper winding speed.

A rewinder is identical to a winder, except that it is usually muchnarrower. A rewinder usually operates in a finishing room, and is usedfor rewinding the rolls which have been slit into comparatively narrowwidths on the winder and slitting them again into very narrow widths. Itis also used for rewinding rolls which have been damaged on the way tothe finishing room, and for many other miscellaneous jobs.

The ejector mechanism, which is the subject of this invention, compriseslinked arms which move in unison to eject rolls of all sizes, by pushingon the core shafit journals of small-rolls, or by pushing large-rollswith a largeroll ejector.

The principal object of the invention is to provide a new and improvedwinder or rewinder for a paper machine or the like, which will ejectrolls of paper, or other material, of any size from a fully wound rolldown to an empty core shaft.

Another object is to provide means for gently lowering a core shaftbetween the drums when loading a core shaft onto the winder.

A further object is to provide means for ejecting a core shflt after abad start or for other reasons.

Another object is to provide a device of the character set forth whichis more simple and economical than prior devices and which employs onlyone actuating mechanism.

Another object is to provide a device of the character set forth whereinonly one control is required for all movements.

Another object is to provide a device of the character set forth whicheffectively utilizes the full range of the winder, by making it possibleto wind rolls of any size without delay in the winding operation, thusallowing unrestricted choice of roll diameter and permitting the salvageof paper.

Other objects and advantages of the invention will be apparent from thefollowing description taken in connection with the accompanying drawingswherein the preferred form has been given by Way of illustration only.

Conventional methods of ejecting rolls from winders or rewinders arecapable only of ejecting rolls from a fuliy wound roll down to a certainminimum roll size. Below this minimum size the rolls must be removed byhand or crane or by means of a separate ejector for smallrolls and coreshafts.

The disadvantages of such conventional methods include the fact thatthey call for excessively strenuous effort by the machine operators, aretime consuming and, in the case of the third method mentioned, requireextra equipment. v

Referring to the drawings:

FIG. 1 is a side elevation of the preferred form of the invention on awinder device;

FIG. 2 is a front elevation of the apparatus shown in FIG. 1;

FIG. 3 is a view generally similar to FIG. 1, but showing the ejector atrest;

FIG. 4 is a side elevation generally similar to FIGS. 1 and 3, butshowing the ejector in maximum eject position;

FIGS. 5 to 8 are side elevations of modified forms of the invention;and. 1

FIG. 9 is a sectional view taken'on line 99* of FIG. 7.

Referring more particularly to the drawings wherein similar referencecharacters designate corresponding parts throughout, FIGS. 3 and 4 showseveral roll sizes, superimposed for simplicity in illustration, from anempty core shaft (2, to small-roll b, to intermediate roll c, to fullywound roll d.

In the arrangement shown in FIGS. 1 to 4, the largeroll ejector 1 ispositioned on arms 2 which pivot about fulcrum points 3 and are actuatedby fluid cylinders 4. Large-roll ejector 1 moves in an are around reardrum 5.

The small-roll ejector arms 7 pivot about the axis of the front drum 6.

Large-roll ejector arms 2 and small-roll ejector arms 7 are linkedtogether with tie rods 8, forcing both ejector arms to move in unison.

When actuated, large roll ejector 1 ejects rolls from the fully woundsize roll d down to the intermediate drums 5 and 6 using the axis offree wheeling front drum 6 as a fulcrum point and starts rolling off thewinder as soon as its centre of gravity moves over the centre line offront drum 6.

Both ejectors 1 and 7 are actuated by the same device, fluid cylinders4, and move in unison through (tie rods 8, which are in compressionduring the ejection movement. This makes it possible to use one simplecontrol device for the entire ejection system.

Smail-roll ejector .arms 7 may also be used to gently lower core shaft abetween drums 5 and 6 when loading the winder, as follows. 7 I

Core shaft a is rolled against the small-roll ejector arms 7, which arein maximum eject position. Small-roll ejector arms 7 are then loweredinto their at res positions, thus gently lowering core shaft a betweendrums 5 and 6 and preventing any damage.

FIGS. 5 to 8 show alternative executions of the invention.

In the execution shown in FIG. 5, the large-roll ejector arms 2;! arepivoted about the axis of rear drum 5, and the small-roll ejector arms7a are pivoted about the axis of front drum 6. Tie rods 8 are mountedbetween extensions 9 from large-roll ejector arms 2a and extensions 10from small-roll ejector arms 7a such that they are in tension during theejection movement. FIG. 6 shows an execution in which the large-rollejector arms 2b are pivoted about the axis of rear drum 5 and thesmall-roll eject-or arms 7a are pivoted about the axis of front drum 6.Tie rods 8 are mounted between gear segments 9a extending fromlarge-ro1l ejector arms 2b and extension 1%, extending from small-rollejector arms 7a such that, in a manner similar to the execution shown inFIG. 5, they are in tension during the ejection movement. Gear pinions4a are positioned in engaging contact with gear segments 59a and supplythe actuating torque.

In the execution shown in FIG. 7, large-roll ejector arms 2c andsmall-roll ejector arms 7b are pivoted about the axes of rear drum 5 andfront drum 6 respectively. Gear segments b extend from large-rollejector arms 2c and gear segments 16:: extend from small-rollejectorarms 70, with gear pinions 4a positioned in engaging contact to supplyactuating torque simultaneously to gear segments )b and 100. t

MG. 9 is a section on 9-9 of FIG. 7 and shows in detail the engagingcontact between gear segments 9b and 19a and gear pinions 4a.

In the execution shown in FIG. 8, large-roll ejector arms 2d andsmall-roll ejector arms 7c are 'pivoted about the axes of rear drum 5and front drum 6 respectively. Chain sprockets are fixed to the ejectorarms 2d and 7c,

coaxial with the axes of the drums and are mechanically linked by chainloops 8a, driven by driving sprockets 4b.

From the foregoing, it will be seen that I have provided new andimproved means for obtaining all of the objects and advantages of theinvention.

l claim: 7

In a winder for paper machines including a base frame and a pair ofdrums for supporting and driving rolls of paper by surface contact, saidpair of drums suitably journalled on said base frame, means for ejectinglarge rolls and small rolls, said means including a largeroll ejectorand large-roll ejector arms pivotally mounted and small-roll ejectorarms pivotally mounted coaxial with the journals of one of said pair ofdrums, and means for actuating simultaneously said large-roll ejectorarms and said small-roll ejector arms, said means including fluid 7cylinders operatively connected to said large-roll ejector j arms andtie-rods operatively connected between said large-roll ejector arms andsaid small-roll ejector arms. References Cited in the file of thispatent UNITED STATES PATENTS 1,939,198 Berry Dec. 12, 1933

